大蒜线虫有大蒜根腐线虫和马铃薯茎线虫两种,分布广泛,寄主达百余种植物。一、危害症状大蒜根腐线虫,以成虫和幼虫为害蒜株的根茎部位,典型症状是植株无根须。受害后蒜株矮小黄化,新生叶不能开展,蒜叶细长、卷曲折叠;假茎和蒜薹肿胀粗短,畸形、弯曲;根部初呈暗褐色斑,随后茎盘朽烂,根须 Garlic nematodes have garlic root rot nematodes and potato stem two nematodes, widely distributed, the host up to a hundred kinds of plants. First, the harmful symptoms Garlic root rot nematodes, adult worms and larvae garlic root parts, the typical symptoms are plants without root beard. Suffering after garlic short dwarf yellows, the new leaves can not be carried out, garlic leaf slender, curly folds; pseudostem and garlic sprouting stubby, deformity, bending; root early dark brown spots, followed by decay of stems, roots